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American Focus > Blog > Tech and Science > TRAPPIST-1 Planets Could Be Swimming in Water, Study Shows : ScienceAlert
Tech and Science

TRAPPIST-1 Planets Could Be Swimming in Water, Study Shows : ScienceAlert

Last updated: May 19, 2025 2:20 pm
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TRAPPIST-1 Planets Could Be Swimming in Water, Study Shows : ScienceAlert
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Water-Rich Planetary System Discovered 40 Light-Years Away

A recent study has revealed exciting new findings about a seven-planet system located approximately 40 light-years from Earth. This system, orbiting the red dwarf star TRAPPIST-1, has captured the attention of astronomers due to its potential abundance of water, a crucial element for supporting life.

Ever since the discovery of the exoplanets in the TRAPPIST-1 system in February 2017, scientists have been closely monitoring the system for signs of life, particularly focusing on the presence of biosignatures. The latest research suggests that these planets may indeed be swimming in water.

One of the primary concerns regarding the habitability of planets orbiting red dwarf stars like TRAPPIST-1 is the stability of water on these worlds. While previous studies have indicated the possibility of an overabundance of water on planets orbiting red dwarfs, the challenge lies in whether these planets can retain this water over time.

A team of researchers led by astrobiologist Trent Thomas from the University of Washington recently conducted a study to investigate the presence of water on the TRAPPIST-1 planets. Their research, supported by observations from the James Webb Space Telescope (JWST), provided valuable insights into the potential habitability of these distant worlds.

Trappist Cores
Modeling on the interiors of TRAPPIST exoplanets. (NASA/JPL-Caltech/R. Hurt (IPAC))

Observations of TRAPPIST-1 c by JWST ruled out the presence of a thick carbon dioxide atmosphere, suggesting that the planet may not resemble Venus as previously thought. However, the possibility of water vapor and oxygen remains, potentially supplied by volcanic outgassing.

The researchers developed a theoretical outgassing model based on the rocky planets in our Solar System to estimate plausible outgassing rates on the TRAPPIST-1 planets. Their findings indicated varying levels of outgassing activity, with some planets potentially exhibiting volcanic inactivity similar to Mars.

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While the TRAPPIST-1 planets may have relatively dry Earth-like mantles, there is still a possibility that water could make up a significant fraction of their mass. These results challenge previous assumptions about the water content of rocky planets and highlight the complexity of planetary systems like TRAPPIST-1.

Ultimately, the presence of water on these planets opens up intriguing possibilities for their habitability. Further observations and research are needed to fully understand the potential for life on worlds within the TRAPPIST-1 system. The findings of this study have been detailed in a preprint available on arXiv.

TAGGED:planetsScienceAlertShowsStudySwimmingTRAPPIST1water
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